Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1976-09-13
1977-10-11
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
307233R, 328140, 329119, 329134, 329192, 329205R, 330277, H03D 326
Patent
active
040538419
ABSTRACT:
A microwave frequency discriminator comprising a field effect transistor (FET) amplifier including an input impedance shaping network, a biasing circuit and a detector. The FET is biased to generate an output RF signal within a predetermined frequency bandwidth in response to an input RF signal of substantially constant power level. The input shaping network is formed to augment the frequency gain roll-off characteristic of the FET and the biasing circuit is used to electronically match the impedance of the FET output to the input of the detector. At such conditions of matched impedances the output dc voltage of the detector varies substantially linearly throughout the frequency bandwidth as a function of the frequency of the input RF signal approximating the characteristic of a frequency discriminator.
REFERENCES:
patent: 3163826 (1964-12-01), Kemper
patent: 3676785 (1972-07-01), Pichal
patent: 3975699 (1976-08-01), Van Anda et al.
Napoli Louis Sebastian
Rosen Arye
Christoffersen H.
Grimm Siegfried H.
Lazar Joseph D.
RCA Corporation
Rodrick Robert M.
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